Blacklisted ISP workaround solution

It happens over and over — users trying to send legitimate email messages are blocked from sending because the IP address that they are getting from their Internet Service Provider (ISP) for their personal computer (or small office) is on some major blacklist, like SpamHaus. 


Users invariably ask:

Why is the mail blocked even though I am sending through Outlook? What can I do about it?

1)What’s the Solution?

WebMail: One solution is to send outbound email via a WebMail service like Gmail or Hotmail.

WebMail services are accessed by a web browser (like Chrome, FireFox, or Internet Explorer) will not generally include your computer’s IP address in the message header and thus any blacklisting of your IP address will not be an issue.

How to access webmail:

username: your full emailaddress
password: your email password.

2) OK, what about sending via SMTP with your favorite Outlook or Thunderbird program?

HDWEBPROVIDER has found a workarround solution to this issue for this. With this approach, the user configures his/her email program to use the POP3 SSL encrypted port.

- Please change your port settings to: Incomming: 995
- Outgoing (SMTP): 465
- Use: SSL
- Select Checkbox This server requires encrypted connection


  • Email, SSL
  • 0 Users Found This Useful
Was this answer helpful?

Related Articles

535 Incorrect authentication data

If you have a Linux dedicated server, you can fix this problem. In root WHM, go to Email >...

550 Error : Dictionary Attack

Dictionary AttackA method often used by spammers. They send various emails or passwords to a...

Are you able to receive emails but not send?

If you aren't able to send this usually means one thing... your internet provider is blocking you...

Are you able to send emails but not receive?

Either your domain is over quota, or your e-mail address itself is over quota. You will need to...


Box Trapper returns a confirmation email to senders, who must reply before their email is...